Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013-2017, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/mutex.h> |
| 21 | #include <linux/list.h> |
| 22 | #include <linux/dma-mapping.h> |
| 23 | #include <linux/dma-buf.h> |
| 24 | #include <linux/iommu.h> |
| 25 | #include <linux/platform_device.h> |
Laxminath Kasam | 605b42f | 2017-08-01 22:02:15 +0530 | [diff] [blame^] | 26 | #include <ipc/apr.h> |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 27 | #include <linux/of_device.h> |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 28 | #include <linux/export.h> |
| 29 | #include <asm/dma-iommu.h> |
Laxminath Kasam | 605b42f | 2017-08-01 22:02:15 +0530 | [diff] [blame^] | 30 | #include <dsp/msm_audio_ion.h> |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 31 | |
| 32 | #define MSM_AUDIO_ION_PROBED (1 << 0) |
| 33 | |
| 34 | #define MSM_AUDIO_ION_PHYS_ADDR(alloc_data) \ |
| 35 | alloc_data->table->sgl->dma_address |
| 36 | |
| 37 | #define MSM_AUDIO_ION_VA_START 0x10000000 |
| 38 | #define MSM_AUDIO_ION_VA_LEN 0x0FFFFFFF |
| 39 | |
| 40 | #define MSM_AUDIO_SMMU_SID_OFFSET 32 |
| 41 | |
| 42 | struct msm_audio_ion_private { |
| 43 | bool smmu_enabled; |
| 44 | bool audioheap_enabled; |
| 45 | struct device *cb_dev; |
| 46 | struct dma_iommu_mapping *mapping; |
| 47 | u8 device_status; |
| 48 | struct list_head alloc_list; |
| 49 | struct mutex list_mutex; |
| 50 | u64 smmu_sid_bits; |
| 51 | u32 smmu_version; |
| 52 | }; |
| 53 | |
| 54 | struct msm_audio_alloc_data { |
| 55 | struct ion_client *client; |
| 56 | struct ion_handle *handle; |
| 57 | size_t len; |
| 58 | struct dma_buf *dma_buf; |
| 59 | struct dma_buf_attachment *attach; |
| 60 | struct sg_table *table; |
| 61 | struct list_head list; |
| 62 | }; |
| 63 | |
| 64 | static struct msm_audio_ion_private msm_audio_ion_data = {0,}; |
| 65 | |
| 66 | static int msm_audio_ion_get_phys(struct ion_client *client, |
| 67 | struct ion_handle *handle, |
| 68 | ion_phys_addr_t *addr, size_t *len); |
| 69 | |
| 70 | static int msm_audio_dma_buf_map(struct ion_client *client, |
| 71 | struct ion_handle *handle, |
| 72 | ion_phys_addr_t *addr, size_t *len); |
| 73 | |
| 74 | static int msm_audio_dma_buf_unmap(struct ion_client *client, |
| 75 | struct ion_handle *handle); |
| 76 | |
| 77 | static void msm_audio_ion_add_allocation( |
| 78 | struct msm_audio_ion_private *msm_audio_ion_data, |
| 79 | struct msm_audio_alloc_data *alloc_data) |
| 80 | { |
| 81 | /* |
| 82 | * Since these APIs can be invoked by multiple |
| 83 | * clients, there is need to make sure the list |
| 84 | * of allocations is always protected |
| 85 | */ |
| 86 | mutex_lock(&(msm_audio_ion_data->list_mutex)); |
| 87 | list_add_tail(&(alloc_data->list), |
| 88 | &(msm_audio_ion_data->alloc_list)); |
| 89 | mutex_unlock(&(msm_audio_ion_data->list_mutex)); |
| 90 | } |
| 91 | |
| 92 | int msm_audio_ion_alloc(const char *name, struct ion_client **client, |
| 93 | struct ion_handle **handle, size_t bufsz, |
| 94 | ion_phys_addr_t *paddr, size_t *pa_len, void **vaddr) |
| 95 | { |
| 96 | int rc = -EINVAL; |
| 97 | unsigned long err_ion_ptr = 0; |
| 98 | |
| 99 | if ((msm_audio_ion_data.smmu_enabled == true) && |
| 100 | !(msm_audio_ion_data.device_status & MSM_AUDIO_ION_PROBED)) { |
| 101 | pr_debug("%s:probe is not done, deferred\n", __func__); |
| 102 | return -EPROBE_DEFER; |
| 103 | } |
| 104 | if (!name || !client || !handle || !paddr || !vaddr |
| 105 | || !bufsz || !pa_len) { |
| 106 | pr_err("%s: Invalid params\n", __func__); |
| 107 | return -EINVAL; |
| 108 | } |
| 109 | *client = msm_audio_ion_client_create(name); |
| 110 | if (IS_ERR_OR_NULL((void *)(*client))) { |
| 111 | pr_err("%s: ION create client for AUDIO failed\n", __func__); |
| 112 | goto err; |
| 113 | } |
| 114 | |
| 115 | *handle = ion_alloc(*client, bufsz, SZ_4K, |
| 116 | ION_HEAP(ION_AUDIO_HEAP_ID), 0); |
| 117 | if (IS_ERR_OR_NULL((void *) (*handle))) { |
| 118 | if (msm_audio_ion_data.smmu_enabled == true) { |
| 119 | pr_debug("system heap is used"); |
| 120 | msm_audio_ion_data.audioheap_enabled = 0; |
| 121 | *handle = ion_alloc(*client, bufsz, SZ_4K, |
| 122 | ION_HEAP(ION_SYSTEM_HEAP_ID), 0); |
| 123 | } |
| 124 | if (IS_ERR_OR_NULL((void *) (*handle))) { |
| 125 | if (IS_ERR((void *)(*handle))) |
| 126 | err_ion_ptr = PTR_ERR((int *)(*handle)); |
| 127 | pr_err("%s:ION alloc fail err ptr=%ld, smmu_enabled=%d\n", |
| 128 | __func__, err_ion_ptr, msm_audio_ion_data.smmu_enabled); |
| 129 | rc = -ENOMEM; |
| 130 | goto err_ion_client; |
| 131 | } |
| 132 | } else { |
| 133 | pr_debug("audio heap is used"); |
| 134 | msm_audio_ion_data.audioheap_enabled = 1; |
| 135 | } |
| 136 | |
| 137 | rc = msm_audio_ion_get_phys(*client, *handle, paddr, pa_len); |
| 138 | if (rc) { |
| 139 | pr_err("%s: ION Get Physical for AUDIO failed, rc = %d\n", |
| 140 | __func__, rc); |
| 141 | goto err_ion_handle; |
| 142 | } |
| 143 | |
| 144 | *vaddr = ion_map_kernel(*client, *handle); |
| 145 | if (IS_ERR_OR_NULL((void *)*vaddr)) { |
| 146 | pr_err("%s: ION memory mapping for AUDIO failed\n", __func__); |
| 147 | goto err_ion_handle; |
| 148 | } |
| 149 | pr_debug("%s: mapped address = %pK, size=%zd\n", __func__, |
| 150 | *vaddr, bufsz); |
| 151 | |
| 152 | if (bufsz != 0) { |
| 153 | pr_debug("%s: memset to 0 %pK %zd\n", __func__, *vaddr, bufsz); |
| 154 | memset((void *)*vaddr, 0, bufsz); |
| 155 | } |
| 156 | |
| 157 | return rc; |
| 158 | |
| 159 | err_ion_handle: |
| 160 | ion_free(*client, *handle); |
| 161 | err_ion_client: |
| 162 | msm_audio_ion_client_destroy(*client); |
| 163 | *handle = NULL; |
| 164 | *client = NULL; |
| 165 | err: |
| 166 | return rc; |
| 167 | } |
| 168 | EXPORT_SYMBOL(msm_audio_ion_alloc); |
| 169 | |
| 170 | int msm_audio_ion_import(const char *name, struct ion_client **client, |
| 171 | struct ion_handle **handle, int fd, |
| 172 | unsigned long *ionflag, size_t bufsz, |
| 173 | ion_phys_addr_t *paddr, size_t *pa_len, void **vaddr) |
| 174 | { |
| 175 | int rc = 0; |
| 176 | |
| 177 | if ((msm_audio_ion_data.smmu_enabled == true) && |
| 178 | !(msm_audio_ion_data.device_status & MSM_AUDIO_ION_PROBED)) { |
| 179 | pr_debug("%s:probe is not done, deferred\n", __func__); |
| 180 | return -EPROBE_DEFER; |
| 181 | } |
| 182 | |
| 183 | if (!name || !client || !handle || !paddr || !vaddr || !pa_len) { |
| 184 | pr_err("%s: Invalid params\n", __func__); |
| 185 | rc = -EINVAL; |
| 186 | goto err; |
| 187 | } |
| 188 | |
| 189 | *client = msm_audio_ion_client_create(name); |
| 190 | if (IS_ERR_OR_NULL((void *)(*client))) { |
| 191 | pr_err("%s: ION create client for AUDIO failed\n", __func__); |
| 192 | rc = -EINVAL; |
| 193 | goto err; |
| 194 | } |
| 195 | |
| 196 | /* name should be audio_acdb_client or Audio_Dec_Client, |
| 197 | * bufsz should be 0 and fd shouldn't be 0 as of now |
| 198 | */ |
| 199 | *handle = ion_import_dma_buf_fd(*client, fd); |
| 200 | pr_debug("%s: DMA Buf name=%s, fd=%d handle=%pK\n", __func__, |
| 201 | name, fd, *handle); |
| 202 | if (IS_ERR_OR_NULL((void *) (*handle))) { |
| 203 | pr_err("%s: ion import dma buffer failed\n", |
| 204 | __func__); |
| 205 | rc = -EINVAL; |
| 206 | goto err_destroy_client; |
| 207 | } |
| 208 | |
| 209 | if (ionflag != NULL) { |
| 210 | rc = ion_handle_get_flags(*client, *handle, ionflag); |
| 211 | if (rc) { |
| 212 | pr_err("%s: could not get flags for the handle\n", |
| 213 | __func__); |
| 214 | goto err_ion_handle; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | rc = msm_audio_ion_get_phys(*client, *handle, paddr, pa_len); |
| 219 | if (rc) { |
| 220 | pr_err("%s: ION Get Physical for AUDIO failed, rc = %d\n", |
| 221 | __func__, rc); |
| 222 | goto err_ion_handle; |
| 223 | } |
| 224 | |
| 225 | *vaddr = ion_map_kernel(*client, *handle); |
| 226 | if (IS_ERR_OR_NULL((void *)*vaddr)) { |
| 227 | pr_err("%s: ION memory mapping for AUDIO failed\n", __func__); |
| 228 | rc = -ENOMEM; |
| 229 | goto err_ion_handle; |
| 230 | } |
| 231 | pr_debug("%s: mapped address = %pK, size=%zd\n", __func__, |
| 232 | *vaddr, bufsz); |
| 233 | |
| 234 | return 0; |
| 235 | |
| 236 | err_ion_handle: |
| 237 | ion_free(*client, *handle); |
| 238 | err_destroy_client: |
| 239 | msm_audio_ion_client_destroy(*client); |
| 240 | *client = NULL; |
| 241 | *handle = NULL; |
| 242 | err: |
| 243 | return rc; |
| 244 | } |
| 245 | |
| 246 | int msm_audio_ion_free(struct ion_client *client, struct ion_handle *handle) |
| 247 | { |
| 248 | if (!client || !handle) { |
| 249 | pr_err("%s Invalid params\n", __func__); |
| 250 | return -EINVAL; |
| 251 | } |
| 252 | if (msm_audio_ion_data.smmu_enabled) |
| 253 | msm_audio_dma_buf_unmap(client, handle); |
| 254 | |
| 255 | ion_unmap_kernel(client, handle); |
| 256 | |
| 257 | ion_free(client, handle); |
| 258 | msm_audio_ion_client_destroy(client); |
| 259 | return 0; |
| 260 | } |
| 261 | EXPORT_SYMBOL(msm_audio_ion_free); |
| 262 | |
| 263 | int msm_audio_ion_mmap(struct audio_buffer *ab, |
| 264 | struct vm_area_struct *vma) |
| 265 | { |
| 266 | struct sg_table *table; |
| 267 | unsigned long addr = vma->vm_start; |
| 268 | unsigned long offset = vma->vm_pgoff * PAGE_SIZE; |
| 269 | struct scatterlist *sg; |
| 270 | unsigned int i; |
| 271 | struct page *page; |
| 272 | int ret; |
| 273 | |
| 274 | pr_debug("%s\n", __func__); |
| 275 | |
| 276 | table = ion_sg_table(ab->client, ab->handle); |
| 277 | |
| 278 | if (IS_ERR(table)) { |
| 279 | pr_err("%s: Unable to get sg_table from ion: %ld\n", |
| 280 | __func__, PTR_ERR(table)); |
| 281 | return PTR_ERR(table); |
| 282 | } else if (!table) { |
| 283 | pr_err("%s: sg_list is NULL\n", __func__); |
| 284 | return -EINVAL; |
| 285 | } |
| 286 | |
| 287 | /* uncached */ |
| 288 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); |
| 289 | |
| 290 | /* We need to check if a page is associated with this sg list because: |
| 291 | * If the allocation came from a carveout we currently don't have |
| 292 | * pages associated with carved out memory. This might change in the |
| 293 | * future and we can remove this check and the else statement. |
| 294 | */ |
| 295 | page = sg_page(table->sgl); |
| 296 | if (page) { |
| 297 | pr_debug("%s: page is NOT null\n", __func__); |
| 298 | for_each_sg(table->sgl, sg, table->nents, i) { |
| 299 | unsigned long remainder = vma->vm_end - addr; |
| 300 | unsigned long len = sg->length; |
| 301 | |
| 302 | page = sg_page(sg); |
| 303 | |
| 304 | if (offset >= len) { |
| 305 | offset -= len; |
| 306 | continue; |
| 307 | } else if (offset) { |
| 308 | page += offset / PAGE_SIZE; |
| 309 | len -= offset; |
| 310 | offset = 0; |
| 311 | } |
| 312 | len = min(len, remainder); |
| 313 | pr_debug("vma=%pK, addr=%x len=%ld vm_start=%x vm_end=%x vm_page_prot=%lu\n", |
| 314 | vma, (unsigned int)addr, len, |
| 315 | (unsigned int)vma->vm_start, |
| 316 | (unsigned int)vma->vm_end, |
| 317 | (unsigned long)vma->vm_page_prot.pgprot); |
| 318 | remap_pfn_range(vma, addr, page_to_pfn(page), len, |
| 319 | vma->vm_page_prot); |
| 320 | addr += len; |
| 321 | if (addr >= vma->vm_end) |
| 322 | return 0; |
| 323 | } |
| 324 | } else { |
| 325 | ion_phys_addr_t phys_addr; |
| 326 | size_t phys_len; |
| 327 | size_t va_len = 0; |
| 328 | |
| 329 | pr_debug("%s: page is NULL\n", __func__); |
| 330 | ret = ion_phys(ab->client, ab->handle, &phys_addr, &phys_len); |
| 331 | if (ret) { |
| 332 | pr_err("%s: Unable to get phys address from ION buffer: %d\n" |
| 333 | , __func__, ret); |
| 334 | return ret; |
| 335 | } |
| 336 | pr_debug("phys=%pKK len=%zd\n", &phys_addr, phys_len); |
| 337 | pr_debug("vma=%pK, vm_start=%x vm_end=%x vm_pgoff=%ld vm_page_prot=%lu\n", |
| 338 | vma, (unsigned int)vma->vm_start, |
| 339 | (unsigned int)vma->vm_end, vma->vm_pgoff, |
| 340 | (unsigned long)vma->vm_page_prot.pgprot); |
| 341 | va_len = vma->vm_end - vma->vm_start; |
| 342 | if ((offset > phys_len) || (va_len > phys_len-offset)) { |
| 343 | pr_err("wrong offset size %ld, lens= %zd, va_len=%zd\n", |
| 344 | offset, phys_len, va_len); |
| 345 | return -EINVAL; |
| 346 | } |
| 347 | ret = remap_pfn_range(vma, vma->vm_start, |
| 348 | __phys_to_pfn(phys_addr) + vma->vm_pgoff, |
| 349 | vma->vm_end - vma->vm_start, |
| 350 | vma->vm_page_prot); |
| 351 | } |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | |
| 356 | bool msm_audio_ion_is_smmu_available(void) |
| 357 | { |
| 358 | return msm_audio_ion_data.smmu_enabled; |
| 359 | } |
| 360 | |
| 361 | /* move to static section again */ |
| 362 | struct ion_client *msm_audio_ion_client_create(const char *name) |
| 363 | { |
| 364 | struct ion_client *pclient = NULL; |
| 365 | |
| 366 | pclient = msm_ion_client_create(name); |
| 367 | return pclient; |
| 368 | } |
| 369 | |
| 370 | |
| 371 | void msm_audio_ion_client_destroy(struct ion_client *client) |
| 372 | { |
| 373 | pr_debug("%s: client = %pK smmu_enabled = %d\n", __func__, |
| 374 | client, msm_audio_ion_data.smmu_enabled); |
| 375 | |
| 376 | ion_client_destroy(client); |
| 377 | } |
| 378 | |
| 379 | int msm_audio_ion_import_legacy(const char *name, struct ion_client *client, |
| 380 | struct ion_handle **handle, int fd, |
| 381 | unsigned long *ionflag, size_t bufsz, |
| 382 | ion_phys_addr_t *paddr, size_t *pa_len, void **vaddr) |
| 383 | { |
| 384 | int rc = 0; |
| 385 | |
| 386 | if (!name || !client || !handle || !paddr || !vaddr || !pa_len) { |
| 387 | pr_err("%s: Invalid params\n", __func__); |
| 388 | rc = -EINVAL; |
| 389 | goto err; |
| 390 | } |
| 391 | /* client is already created for legacy and given |
| 392 | * name should be audio_acdb_client or Audio_Dec_Client, |
| 393 | * bufsz should be 0 and fd shouldn't be 0 as of now |
| 394 | */ |
| 395 | *handle = ion_import_dma_buf_fd(client, fd); |
| 396 | pr_debug("%s: DMA Buf name=%s, fd=%d handle=%pK\n", __func__, |
| 397 | name, fd, *handle); |
| 398 | if (IS_ERR_OR_NULL((void *)(*handle))) { |
| 399 | pr_err("%s: ion import dma buffer failed\n", |
| 400 | __func__); |
| 401 | rc = -EINVAL; |
| 402 | goto err; |
| 403 | } |
| 404 | |
| 405 | if (ionflag != NULL) { |
| 406 | rc = ion_handle_get_flags(client, *handle, ionflag); |
| 407 | if (rc) { |
| 408 | pr_err("%s: could not get flags for the handle\n", |
| 409 | __func__); |
| 410 | rc = -EINVAL; |
| 411 | goto err_ion_handle; |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | rc = msm_audio_ion_get_phys(client, *handle, paddr, pa_len); |
| 416 | if (rc) { |
| 417 | pr_err("%s: ION Get Physical for AUDIO failed, rc = %d\n", |
| 418 | __func__, rc); |
| 419 | rc = -EINVAL; |
| 420 | goto err_ion_handle; |
| 421 | } |
| 422 | |
| 423 | /*Need to add condition SMMU enable or not */ |
| 424 | *vaddr = ion_map_kernel(client, *handle); |
| 425 | if (IS_ERR_OR_NULL((void *)*vaddr)) { |
| 426 | pr_err("%s: ION memory mapping for AUDIO failed\n", __func__); |
| 427 | rc = -EINVAL; |
| 428 | goto err_ion_handle; |
| 429 | } |
| 430 | |
| 431 | if (bufsz != 0) |
| 432 | memset((void *)*vaddr, 0, bufsz); |
| 433 | |
| 434 | return 0; |
| 435 | |
| 436 | err_ion_handle: |
| 437 | ion_free(client, *handle); |
| 438 | err: |
| 439 | return rc; |
| 440 | } |
| 441 | |
| 442 | int msm_audio_ion_free_legacy(struct ion_client *client, |
| 443 | struct ion_handle *handle) |
| 444 | { |
| 445 | if (msm_audio_ion_data.smmu_enabled) |
| 446 | msm_audio_dma_buf_unmap(client, handle); |
| 447 | |
| 448 | ion_unmap_kernel(client, handle); |
| 449 | |
| 450 | ion_free(client, handle); |
| 451 | /* no client_destrody in legacy*/ |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | int msm_audio_ion_cache_operations(struct audio_buffer *abuff, int cache_op) |
| 456 | { |
| 457 | unsigned long ionflag = 0; |
| 458 | int rc = 0; |
| 459 | int msm_cache_ops = 0; |
| 460 | |
| 461 | if (!abuff) { |
| 462 | pr_err("%s: Invalid params: %pK\n", __func__, abuff); |
| 463 | return -EINVAL; |
| 464 | } |
| 465 | rc = ion_handle_get_flags(abuff->client, abuff->handle, |
| 466 | &ionflag); |
| 467 | if (rc) { |
| 468 | pr_err("ion_handle_get_flags failed: %d\n", rc); |
| 469 | goto cache_op_failed; |
| 470 | } |
| 471 | |
| 472 | /* has to be CACHED */ |
| 473 | if (ION_IS_CACHED(ionflag)) { |
| 474 | /* ION_IOC_INV_CACHES or ION_IOC_CLEAN_CACHES */ |
| 475 | msm_cache_ops = cache_op; |
| 476 | rc = msm_ion_do_cache_op(abuff->client, |
| 477 | abuff->handle, |
| 478 | (unsigned long *) abuff->data, |
| 479 | (unsigned long)abuff->size, |
| 480 | msm_cache_ops); |
| 481 | if (rc) { |
| 482 | pr_err("cache operation failed %d\n", rc); |
| 483 | goto cache_op_failed; |
| 484 | } |
| 485 | } |
| 486 | cache_op_failed: |
| 487 | return rc; |
| 488 | } |
| 489 | |
| 490 | |
| 491 | static int msm_audio_dma_buf_map(struct ion_client *client, |
| 492 | struct ion_handle *handle, |
| 493 | ion_phys_addr_t *addr, size_t *len) |
| 494 | { |
| 495 | |
| 496 | struct msm_audio_alloc_data *alloc_data; |
| 497 | struct device *cb_dev; |
| 498 | int rc = 0; |
| 499 | |
| 500 | cb_dev = msm_audio_ion_data.cb_dev; |
| 501 | |
| 502 | /* Data required per buffer mapping */ |
| 503 | alloc_data = kzalloc(sizeof(*alloc_data), GFP_KERNEL); |
| 504 | if (!alloc_data) |
| 505 | return -ENOMEM; |
| 506 | |
| 507 | /* Get the ION handle size */ |
| 508 | ion_handle_get_size(client, handle, len); |
| 509 | |
| 510 | alloc_data->client = client; |
| 511 | alloc_data->handle = handle; |
| 512 | alloc_data->len = *len; |
| 513 | |
| 514 | /* Get the dma_buf handle from ion_handle */ |
| 515 | alloc_data->dma_buf = ion_share_dma_buf(client, handle); |
| 516 | if (IS_ERR(alloc_data->dma_buf)) { |
| 517 | rc = PTR_ERR(alloc_data->dma_buf); |
| 518 | dev_err(cb_dev, |
| 519 | "%s: Fail to get dma_buf handle, rc = %d\n", |
| 520 | __func__, rc); |
| 521 | goto err_dma_buf; |
| 522 | } |
| 523 | |
| 524 | /* Attach the dma_buf to context bank device */ |
| 525 | alloc_data->attach = dma_buf_attach(alloc_data->dma_buf, |
| 526 | cb_dev); |
| 527 | if (IS_ERR(alloc_data->attach)) { |
| 528 | rc = PTR_ERR(alloc_data->attach); |
| 529 | dev_err(cb_dev, |
| 530 | "%s: Fail to attach dma_buf to CB, rc = %d\n", |
| 531 | __func__, rc); |
| 532 | goto err_attach; |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | * Get the scatter-gather list. |
| 537 | * There is no info as this is a write buffer or |
| 538 | * read buffer, hence the request is bi-directional |
| 539 | * to accommodate both read and write mappings. |
| 540 | */ |
| 541 | alloc_data->table = dma_buf_map_attachment(alloc_data->attach, |
| 542 | DMA_BIDIRECTIONAL); |
| 543 | if (IS_ERR(alloc_data->table)) { |
| 544 | rc = PTR_ERR(alloc_data->table); |
| 545 | dev_err(cb_dev, |
| 546 | "%s: Fail to map attachment, rc = %d\n", |
| 547 | __func__, rc); |
| 548 | goto err_map_attach; |
| 549 | } |
| 550 | |
| 551 | rc = dma_map_sg(cb_dev, alloc_data->table->sgl, |
| 552 | alloc_data->table->nents, |
| 553 | DMA_BIDIRECTIONAL); |
| 554 | if (rc != alloc_data->table->nents) { |
| 555 | dev_err(cb_dev, |
| 556 | "%s: Fail to map SG, rc = %d, nents = %d\n", |
| 557 | __func__, rc, alloc_data->table->nents); |
| 558 | goto err_map_sg; |
| 559 | } |
| 560 | /* Make sure not to return rc from dma_map_sg, as it can be nonzero */ |
| 561 | rc = 0; |
| 562 | |
| 563 | /* physical address from mapping */ |
| 564 | *addr = MSM_AUDIO_ION_PHYS_ADDR(alloc_data); |
| 565 | |
| 566 | msm_audio_ion_add_allocation(&msm_audio_ion_data, |
| 567 | alloc_data); |
| 568 | return rc; |
| 569 | |
| 570 | err_map_sg: |
| 571 | dma_buf_unmap_attachment(alloc_data->attach, |
| 572 | alloc_data->table, |
| 573 | DMA_BIDIRECTIONAL); |
| 574 | err_map_attach: |
| 575 | dma_buf_detach(alloc_data->dma_buf, |
| 576 | alloc_data->attach); |
| 577 | err_attach: |
| 578 | dma_buf_put(alloc_data->dma_buf); |
| 579 | |
| 580 | err_dma_buf: |
| 581 | kfree(alloc_data); |
| 582 | |
| 583 | return rc; |
| 584 | } |
| 585 | |
| 586 | static int msm_audio_dma_buf_unmap(struct ion_client *client, |
| 587 | struct ion_handle *handle) |
| 588 | { |
| 589 | int rc = 0; |
| 590 | struct msm_audio_alloc_data *alloc_data = NULL; |
| 591 | struct list_head *ptr, *next; |
| 592 | struct device *cb_dev = msm_audio_ion_data.cb_dev; |
| 593 | bool found = false; |
| 594 | |
| 595 | /* |
| 596 | * Though list_for_each_safe is delete safe, lock |
| 597 | * should be explicitly acquired to avoid race condition |
| 598 | * on adding elements to the list. |
| 599 | */ |
| 600 | mutex_lock(&(msm_audio_ion_data.list_mutex)); |
| 601 | list_for_each_safe(ptr, next, |
| 602 | &(msm_audio_ion_data.alloc_list)) { |
| 603 | |
| 604 | alloc_data = list_entry(ptr, struct msm_audio_alloc_data, |
| 605 | list); |
| 606 | |
| 607 | if (alloc_data->handle == handle && |
| 608 | alloc_data->client == client) { |
| 609 | found = true; |
| 610 | dma_unmap_sg(cb_dev, |
| 611 | alloc_data->table->sgl, |
| 612 | alloc_data->table->nents, |
| 613 | DMA_BIDIRECTIONAL); |
| 614 | |
| 615 | dma_buf_unmap_attachment(alloc_data->attach, |
| 616 | alloc_data->table, |
| 617 | DMA_BIDIRECTIONAL); |
| 618 | |
| 619 | dma_buf_detach(alloc_data->dma_buf, |
| 620 | alloc_data->attach); |
| 621 | |
| 622 | dma_buf_put(alloc_data->dma_buf); |
| 623 | |
| 624 | list_del(&(alloc_data->list)); |
| 625 | kfree(alloc_data); |
| 626 | break; |
| 627 | } |
| 628 | } |
| 629 | mutex_unlock(&(msm_audio_ion_data.list_mutex)); |
| 630 | |
| 631 | if (!found) { |
| 632 | dev_err(cb_dev, |
| 633 | "%s: cannot find allocation, ion_handle %pK, ion_client %pK", |
| 634 | __func__, handle, client); |
| 635 | rc = -EINVAL; |
| 636 | } |
| 637 | |
| 638 | return rc; |
| 639 | } |
| 640 | |
| 641 | static int msm_audio_ion_get_phys(struct ion_client *client, |
| 642 | struct ion_handle *handle, |
| 643 | ion_phys_addr_t *addr, size_t *len) |
| 644 | { |
| 645 | int rc = 0; |
| 646 | |
| 647 | pr_debug("%s: smmu_enabled = %d\n", __func__, |
| 648 | msm_audio_ion_data.smmu_enabled); |
| 649 | |
| 650 | if (msm_audio_ion_data.smmu_enabled) { |
| 651 | rc = msm_audio_dma_buf_map(client, handle, addr, len); |
| 652 | if (rc) { |
| 653 | pr_err("%s: failed to map DMA buf, err = %d\n", |
| 654 | __func__, rc); |
| 655 | goto err; |
| 656 | } |
| 657 | /* Append the SMMU SID information to the IOVA address */ |
| 658 | *addr |= msm_audio_ion_data.smmu_sid_bits; |
| 659 | } else { |
| 660 | rc = ion_phys(client, handle, addr, len); |
| 661 | } |
| 662 | |
| 663 | pr_debug("phys=%pK, len=%zd, rc=%d\n", &(*addr), *len, rc); |
| 664 | err: |
| 665 | return rc; |
| 666 | } |
| 667 | |
| 668 | static int msm_audio_smmu_init(struct device *dev) |
| 669 | { |
| 670 | struct dma_iommu_mapping *mapping; |
| 671 | int ret; |
| 672 | |
| 673 | mapping = arm_iommu_create_mapping(&platform_bus_type, |
| 674 | MSM_AUDIO_ION_VA_START, |
| 675 | MSM_AUDIO_ION_VA_LEN); |
| 676 | if (IS_ERR(mapping)) |
| 677 | return PTR_ERR(mapping); |
| 678 | |
| 679 | ret = arm_iommu_attach_device(dev, mapping); |
| 680 | if (ret) { |
| 681 | dev_err(dev, "%s: Attach failed, err = %d\n", |
| 682 | __func__, ret); |
| 683 | goto fail_attach; |
| 684 | } |
| 685 | |
| 686 | msm_audio_ion_data.cb_dev = dev; |
| 687 | msm_audio_ion_data.mapping = mapping; |
| 688 | INIT_LIST_HEAD(&msm_audio_ion_data.alloc_list); |
| 689 | mutex_init(&(msm_audio_ion_data.list_mutex)); |
| 690 | |
| 691 | return 0; |
| 692 | |
| 693 | fail_attach: |
| 694 | arm_iommu_release_mapping(mapping); |
| 695 | return ret; |
| 696 | } |
| 697 | |
| 698 | static const struct of_device_id msm_audio_ion_dt_match[] = { |
| 699 | { .compatible = "qcom,msm-audio-ion" }, |
| 700 | { } |
| 701 | }; |
| 702 | MODULE_DEVICE_TABLE(of, msm_audio_ion_dt_match); |
| 703 | |
| 704 | |
| 705 | u32 msm_audio_ion_get_smmu_sid_mode32(void) |
| 706 | { |
| 707 | if (msm_audio_ion_data.smmu_enabled) |
| 708 | return upper_32_bits(msm_audio_ion_data.smmu_sid_bits); |
| 709 | else |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | u32 msm_audio_populate_upper_32_bits(ion_phys_addr_t pa) |
| 714 | { |
| 715 | if (sizeof(ion_phys_addr_t) == sizeof(u32)) |
| 716 | return msm_audio_ion_get_smmu_sid_mode32(); |
| 717 | else |
| 718 | return upper_32_bits(pa); |
| 719 | } |
| 720 | |
| 721 | static int msm_audio_ion_probe(struct platform_device *pdev) |
| 722 | { |
| 723 | int rc = 0; |
| 724 | const char *msm_audio_ion_dt = "qcom,smmu-enabled"; |
| 725 | const char *msm_audio_ion_smmu = "qcom,smmu-version"; |
| 726 | const char *msm_audio_ion_smmu_sid_mask = "qcom,smmu-sid-mask"; |
| 727 | bool smmu_enabled; |
| 728 | enum apr_subsys_state q6_state; |
| 729 | struct device *dev = &pdev->dev; |
| 730 | |
| 731 | if (dev->of_node == NULL) { |
| 732 | dev_err(dev, |
| 733 | "%s: device tree is not found\n", |
| 734 | __func__); |
| 735 | msm_audio_ion_data.smmu_enabled = 0; |
| 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | smmu_enabled = of_property_read_bool(dev->of_node, |
| 740 | msm_audio_ion_dt); |
| 741 | msm_audio_ion_data.smmu_enabled = smmu_enabled; |
| 742 | |
| 743 | if (smmu_enabled) { |
| 744 | rc = of_property_read_u32(dev->of_node, |
| 745 | msm_audio_ion_smmu, |
| 746 | &msm_audio_ion_data.smmu_version); |
| 747 | if (rc) { |
| 748 | dev_err(dev, |
| 749 | "%s: qcom,smmu_version missing in DT node\n", |
| 750 | __func__); |
| 751 | return rc; |
| 752 | } |
| 753 | dev_dbg(dev, "%s: SMMU version is (%d)", __func__, |
| 754 | msm_audio_ion_data.smmu_version); |
| 755 | q6_state = apr_get_q6_state(); |
| 756 | if (q6_state == APR_SUBSYS_DOWN) { |
| 757 | dev_dbg(dev, |
| 758 | "defering %s, adsp_state %d\n", |
| 759 | __func__, q6_state); |
| 760 | return -EPROBE_DEFER; |
| 761 | } |
| 762 | dev_dbg(dev, "%s: adsp is ready\n", __func__); |
| 763 | } |
| 764 | |
| 765 | dev_dbg(dev, "%s: SMMU is %s\n", __func__, |
| 766 | (smmu_enabled) ? "Enabled" : "Disabled"); |
| 767 | |
| 768 | if (smmu_enabled) { |
| 769 | u64 smmu_sid = 0; |
| 770 | u64 smmu_sid_mask = 0; |
| 771 | struct of_phandle_args iommuspec; |
| 772 | |
| 773 | /* Get SMMU SID information from Devicetree */ |
| 774 | rc = of_property_read_u64(dev->of_node, |
| 775 | msm_audio_ion_smmu_sid_mask, |
| 776 | &smmu_sid_mask); |
| 777 | if (rc) { |
| 778 | dev_err(dev, |
| 779 | "%s: qcom,smmu-sid-mask missing in DT node, using default\n", |
| 780 | __func__); |
| 781 | smmu_sid_mask = 0xFFFFFFFFFFFFFFFF; |
| 782 | } |
| 783 | rc = of_parse_phandle_with_args(dev->of_node, "iommus", |
| 784 | "#iommu-cells", 0, &iommuspec); |
| 785 | if (rc) |
| 786 | dev_err(dev, "%s: could not get smmu SID, ret = %d\n", |
| 787 | __func__, rc); |
| 788 | else |
| 789 | smmu_sid = (iommuspec.args[0] & smmu_sid_mask); |
| 790 | |
| 791 | msm_audio_ion_data.smmu_sid_bits = |
| 792 | smmu_sid << MSM_AUDIO_SMMU_SID_OFFSET; |
| 793 | |
| 794 | if (msm_audio_ion_data.smmu_version == 0x2) { |
| 795 | rc = msm_audio_smmu_init(dev); |
| 796 | } else { |
| 797 | dev_err(dev, "%s: smmu version invalid %d\n", |
| 798 | __func__, msm_audio_ion_data.smmu_version); |
| 799 | rc = -EINVAL; |
| 800 | } |
| 801 | if (rc) |
| 802 | dev_err(dev, "%s: smmu init failed, err = %d\n", |
| 803 | __func__, rc); |
| 804 | } |
| 805 | |
| 806 | if (!rc) |
| 807 | msm_audio_ion_data.device_status |= MSM_AUDIO_ION_PROBED; |
| 808 | |
| 809 | return rc; |
| 810 | } |
| 811 | |
| 812 | static int msm_audio_ion_remove(struct platform_device *pdev) |
| 813 | { |
| 814 | struct dma_iommu_mapping *mapping; |
| 815 | struct device *audio_cb_dev; |
| 816 | |
| 817 | mapping = msm_audio_ion_data.mapping; |
| 818 | audio_cb_dev = msm_audio_ion_data.cb_dev; |
| 819 | |
| 820 | if (audio_cb_dev && mapping) { |
| 821 | arm_iommu_detach_device(audio_cb_dev); |
| 822 | arm_iommu_release_mapping(mapping); |
| 823 | } |
| 824 | |
| 825 | msm_audio_ion_data.smmu_enabled = 0; |
| 826 | msm_audio_ion_data.device_status = 0; |
| 827 | return 0; |
| 828 | } |
| 829 | |
| 830 | static struct platform_driver msm_audio_ion_driver = { |
| 831 | .driver = { |
| 832 | .name = "msm-audio-ion", |
| 833 | .owner = THIS_MODULE, |
| 834 | .of_match_table = msm_audio_ion_dt_match, |
| 835 | }, |
| 836 | .probe = msm_audio_ion_probe, |
| 837 | .remove = msm_audio_ion_remove, |
| 838 | }; |
| 839 | |
| 840 | static int __init msm_audio_ion_init(void) |
| 841 | { |
| 842 | return platform_driver_register(&msm_audio_ion_driver); |
| 843 | } |
| 844 | module_init(msm_audio_ion_init); |
| 845 | |
| 846 | static void __exit msm_audio_ion_exit(void) |
| 847 | { |
| 848 | platform_driver_unregister(&msm_audio_ion_driver); |
| 849 | } |
| 850 | module_exit(msm_audio_ion_exit); |
| 851 | |
| 852 | MODULE_DESCRIPTION("MSM Audio ION module"); |
| 853 | MODULE_LICENSE("GPL v2"); |